硫黄泉
Iou SpringOperated by · 霧島湯之谷山荘
Sampled at bath inlet
黄
Sulfur
Classification
Sodium-Calcium Bicarbonate-Sulfate spring
A simple sulfur spring (hydrogen sulfide subtype) — pale, clear water with the unmistakable rotten-egg note of H₂S. Weakly acidic and gentle on the skin, with metasilicic acid at 127 mg/kg leaving the kind of silica film that makes skin feel noticeably smoother afterwards. The cert was sampled at the bath inlet of a free-flowing source delivering 148 L/min.
pH
6.13
Weakly acidic
Source temperature
46.8°C
Hot
Tonicity
0.54g/kg
Hypotonic
Flow rate
148L/min
Typical
Free CO₂
295mg/kg
Typical
Free H₂S
3.90mg/kg
High
Radon
7.50Bq/kg
Low
- Color
- pale white and clear
- Taste
- with a faint sediment taste
- Odor
- faint hydrogen sulfide
Highlights
- Sulfur-rich
- High silica
Analyzed Sep 2, 2022·株式会社 東洋環境分析センター·Cert no. IZ2200059-001
